OFFSET
1,1
COMMENTS
MATHEMATICA
Select[Range[1, 300, 2], OddQ[PrimeOmega[DivisorSigma[1, #^2]]] &] (* Amiram Eldar, Sep 19 2021 *)
PROG
(PARI) isA347885(n) = ((n%2)&&(bigomega(sigma(n^2))%2));
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Sep 19 2021
STATUS
approved